Mongolica young stand, secondary natural forest, and the mixed forest of larix olgensis and fraxinus mandshurica rupr. countermeasures for controlling soil degradation were also recommended. the study got following results : ( 1 ) from young stand to mid - age of larix olgensis, with the closure of canopy and the decrease of undergrowth vegetation cover, soil acidity, enzyme activity, total inorganic phosphorus, available k, soil moisture and total porosity decreased significantly ; while soil organic matter content, humus component content, the amount of three main types of microbes, acid phosphatase activity, and bulk density in rhizosphere soil and non - rhizosphere soil increased with the increase of the amount of forest floor litter ; from mid - age stand to near mature stand, with the decrease of stand density and crown cover as well as the restoration of undergrowth vegetation after preliminary thinning, soil organic matter content, fulvic acid, exchangeable acidity, exchangeable aluminium, neutral phosphatase activity, total amount of inorganic phosphorus, the amount of actinomycetes, soil moisture, and total porosity in rhizosphere soil and non - rhizosphere soil apparently increased ; from near matu re stand to mature stand, soil activity acidity, organic matter content, humus component content, available phosphorus, total amount of amino acid, available k, soil enzyme activity, soil moisture, and total porosity in rhizosphere soil and non - rhizosphere soil decreased, but total phosphorus, soil acidity ( in particular, exchangeable aluminium ), and bulk density increased
結果表明: ( 1 )從落葉松幼齡林到中齡林,隨著林冠的
郁閉和林下植被蓋度的急劇下降,林地土壤酸度、土壤酶活性、無機磷總量、速效鉀、土壤水分含量、總孔隙度呈明顯下降趨勢,而根際和非根際土壤有機質含量、腐殖質各組分含量、三大類微生物數量、酸性磷酸酶活性和土壤容重隨著凋落物的增加呈明顯上升趨勢;從中齡林到近熟林,由於撫育間伐,林分密度及
郁閉度下降,林下植被蓋度逐步得到恢復,根際與非根際土壤有機質含量、富里酸、交換性酸、交換性鋁、中性磷酸酶、無機磷總量、放線菌數量、土壤水分含量、總孔隙度呈明顯的上升趨勢;從近熟林到成熟林,隨著林齡的增大,根際與非根際土壤活性酸、有機質含量、腐殖質各組分含量、有效磷含量、氨
基酸總量、速效鉀、土壤酶的活性、土壤水分含量和總孔隙度呈下降趨勢,而根際與非根際土壤全磷含量、土壤酸度(特別是交換性鋁)和容重呈增加趨勢。
Boda ' s nursery sclence base not only provides all kinds of best flowers and plants, but also gives you a place full of flowers perfume and birds singing
公司苗圃科研
基地不僅將為您提供品種繁多、質優品高的花卉苗木,而且還將為您提供草木蔥
郁、鳥語花香的休閑空間。
“ china red ” colouring characteristic is assumes the color to be deep 、 pealike 、 lively , has more intense stimulating to the vision. in traditional chinese culture, red has represented the jubilation, happiness and propitious etc, has riches and honor propitious meaning. once had sent out the dazzling ray in chinaware history, because burns difficultly, its precious technique once lost in the historical dense fog, the red porcelain take the chinese tradition red color as the maincolor, on the scarlet bottle binds there is being fine design which becomescompared to the gold also precious rare metal tantalum burn, the whole artifacts overflows rich and propitious, the red porcelain history is glorious , contains the excellent artistic foundation of basic skills. is the traditional civilization and the modern science and technology perfect union and it is a valuable thing in contemporary chinaware
「中國紅瓷」色彩絢爛、光亮瑩潤、造型秀麗、雍容典雅,而且
基於高溫釉料的獨特技術優勢,可以在表面進行二次加工,配以名家字畫或烤金圖案,富於濃
郁的民族特點和喜慶色彩,是高雅藝術與現代高科技的顛峰之作,具有無與倫比的高科技含量、豐富的文化內涵、極高的審美價值及收藏價值,為陶瓷工藝、陶瓷美學開辟了一個嶄新境界,是當今世界陶瓷科技與藝術的頂峰。
The four data collection instruments included : 1 ) demographic characteristics, 2 ) the symptom distress scale, 3 ) the beck depression inventory ( short form - 13 ), and 4 ) the european organization for research and treatment of cancer quality of life questionnaire ( eortc - qlo - c30 )
問卷內容包括
基本資料問卷、癥狀困擾問卷、憂
郁量表及歐洲癌癥治療與研究組織生活質量量表。
The reasonable model of exploiting and utilizing to the plant resources is put forward, which should be mainly protected. all kinds of communities are analyzed. the aubor ' s average height of karst evergreen - deciduous forest is 6. 88m. theuper arbor ' s average height is 13. 07m. the highest one reaches 25m. the community cover ratio is over 90 %, only few gaps existnatural convalescence forest is inferior to karst evergreen - deciduous forest in the restoration degree. there are a few tall arbor in the community. the height of alpine shrubs forest is 1. 00 to 2. 00m. there is no dominant species. the average height of karst shrubs forest is 0. 97m. the rhus chinensi s, desmodium racemosum and golochidion pubrum are the dominant species
以觀賞及綠化樹種、用材樹種和藥用植物等歸類對洛塔植物資源作出了評價,觀賞植物主要有:玉趼、百合、繡球花等;用材樹種有大葉櫸、香果樹、光灰楸等;藥用植物有南方紅豆杉、杜仲等,並提出了對植物資源以保護為主的合理開發利用模式。分析各類型植物群落的保護年齡,地質與土壤背景以及群落
基本結構和特徵,喀斯特常綠落葉林喬木層平均高度為6 . 88m ,上層喬木平均高13 . 07m ,最高可達25m ,群落
郁蔽度達90以上。
With a sense of wondering and melancholy disillusion, prince andrey heard his laughter and looked at speransky laughing
安德烈公爵帶著驚訝的由於失望而憂
郁的神態靜聽他的笑聲,諦視哈哈大笑的他斯佩蘭斯
基。
Sitting on his throne, sucking red jujubes white. a sombre y. m. c. a. young man, watchful among the warm sweet fumes of graham lemon s, placed a throwaway in a hand of mr bloom
一個神色陰
郁的
基督教青年會4的小夥子,站在格雷厄姆萊蒙的店鋪溢出來的溫馨芳香的水蒸氣里,留心觀察著過往行人,把一張傳單塞到布盧姆先生手裡。
The author analysed the characteristics of routine treatment of chronic peptic ulcer and thought that above mentioned caused the therapy efficacy was not apparent
因此提出氣虛陽
郁是本病發生的內在病理
基礎,認為本病是一種寒熱夾雜,虛實互見的復雜病變。
The woman whom the count had seen leave the ship with so much regret entered this house ; she had scarcely closed the door after her when monte cristo appeared at the corner of a street, so that he found and lost her again almost at the same instant
伯爵看見鬱
郁不歡地離開碼頭的那個女人走進這座房子,她剛走進去,關上門,
基督山便在街角上出現,所以他幾乎剛看見她便又失去了她的蹤跡。
First, the recent studies of ca models for traffic flow, based on the statistical physics, are introduced in the thesis. at the same time, all kinds of models based on the determined ca are also introduced in detail. second, we introduce the improved ns model presented by xueyu to the ca traffic flow model of a two - lane roadway in a highway and on a urban main road
本文首先綜述了各種交通流模型,在簡單介紹了元胞自動機及其理論的基礎上,重點介紹了元胞自動機交通流模型,並在此基礎上,對薛郁提出改進的ns模型加以應用和推廣到雙車道高速公路交通流模型和城市主幹道交通流模型中。